It was also revealed that a takeaway cappuccino contains coffee and milk worth as little as 10p each

And an anonymous poster wrote on Reddit: “Costa are everywhere. They are like a virus. I was in a camping shop the other day with a Costa in it! It’s rubbish coffee.”

Last night a Costa spokesman said: “Many products in motorway service stations are priced higher than on the high street. We regularly review prices in our Express offer to ensure they remain competitive.”